Abstract
To develop gene therapy targeted to the kidney, we compared three different routes of liposome-mediated gene delivery to the kidney in mice, ie intra-renal-pelvic, intra-renal-arterial, and intra-renal-parenchymal injections. A plasmid construct, pCMVβgal, containing a cytomegalovirus (CMV) immediate–early gene promoter and a β-galactosidase reporter gene was mixed with a 1:1 liposome mixture of N[1-(2,3-dioleoyloxy)propyl]-N,N,trimethylammonium chloride (DOTMA)/dioleoyl phosphatidyl ethanolamine (DOPE). The pCMVβgal–liposome complex was injected into the left kidney via three different routes. The efficacy of gene transfer was assessed using 5-bromo-4-chloro-3-indolyl β-d-galactopyranoside (X-gal) staining on frozen kidney sections 3 to 42 days after injections. Cells with β-galactosidase activity were detected in the cortex and outer medulla in both intra-renal-pelvic and intra-renal-arterial groups, but not in the intra-renal-parenchymal group or in the contralateral noninjected kidney. Evidence of gene transfer was observed only in tubular epithelial cells, but not in glomerular, vascular, or interstitial compartments. The levels of β-galactosidase expression started to decrease 3 weeks after injection. The gene transfer in the kidney was not associated with nephrotoxicity as assessed by blood urea nitrogen levels and renal histology. We conclude that both intra-renal-pelvic and intra-renal-arterial injections provide a transient gene transfer to the renal tubular cells and are suitable routes for kidney-targeted gene therapy.
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Lai, LW., Moeckel, G. & Lien, YH. Kidney-targeted liposome-mediated gene transfer in mice. Gene Ther 4, 426–431 (1997). https://doi.org/10.1038/sj.gt.3300406
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DOI: https://doi.org/10.1038/sj.gt.3300406
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